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How can I get the elements from a matrix and use them as the coordinates in another matrix

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giorgos kazas
giorgos kazas on 10 Feb 2020
Commented: giorgos kazas on 10 Feb 2020
I have a matrix
W=[1 3 4 1
1 2 3 1
1 2 4 1]
and I want to get the values of another matrix
C=[0 3 7 8
3 0 1 4
7 1 0 2
8 4 2 0].
That is, I want to take firstly the values of C which exist in (1,3) position, (3,4) position and (4,1) position (the first row of W), i.e. 7,2 and 8 respectively in matrix C and the sum of these values (18). The same indeed for all the rows.

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